// @(#)UDPPacket.java   1/2004
// Copyright (c) 1998-2004, Distributed Real-time Computing Lab (DRCL) 
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package drcl.inet.transport;

import drcl.net.Packet;

/** This class defines the UDP packet header used by {@link UDP}.  */
public class UDPPacket extends Packet
{ 
  public String getName()
  { return "UDP"; }

  int sport, dport;

  public UDPPacket()
  { super(8); }

  /**
   * @param sport_ source port number
   * @param dport_ destination port number
   */
  public UDPPacket (int sport_, int dport_, int hsize_)
  {
    super(hsize_);
    sport = sport_;
    dport = dport_;
  }
  
  /**
   * @param sport_ source port number
   * @param dport_ destination port number
   */
  public UDPPacket (int sport_, int dport_, int hsize_, int bsize_, Object body_)
  {
    super(hsize_, bsize_, body_);
    sport = sport_;
    dport = dport_;
  }
  
  /** Returns the source port number of the UDP packet. */
  public int getSPort()
  { return sport; }
  
  /** Returns the destination port number of the UDP packet. */
  public int getDPort()
  { return dport; }
  
  public void setSPort(int value_)
  { sport = value_; }
  
  public void setDPort(int value_)
  { dport = value_; }
  
  /*
  public void duplicate(Object source_)
  {
    super.duplicate(source_);
    UDPPacket that_ = (UDPPacket)source_;
    sport = that_.sport;
    dport = that_.dport;
    setHeaderSize(that_.headerSize);
  }
  */

  public Object clone()
  {
    return new UDPPacket(sport, dport, headerSize, size-headerSize,
      body instanceof drcl.ObjectCloneable?
        ((drcl.ObjectCloneable)body).clone(): body);
  }

  public String _toString(String separator_)
  { return "s:" + sport + separator_ + "d:" + dport; }
}
